US11119393B2 - Projector - Google Patents

Projector Download PDF

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Publication number
US11119393B2
US11119393B2 US16/887,761 US202016887761A US11119393B2 US 11119393 B2 US11119393 B2 US 11119393B2 US 202016887761 A US202016887761 A US 202016887761A US 11119393 B2 US11119393 B2 US 11119393B2
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Prior art keywords
image
optical system
optical axis
projection
projector
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US16/887,761
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US20200292924A1 (en
Inventor
Masaru Amano
Yukiko Nagatoshi
Hironobu Kayano
Kenji Ito
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Fujifilm Corp
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Fujifilm Corp
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Assigned to FUJIFILM CORPORATION reassignment FUJIFILM CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ITO, KENJI, AMANO, MASARU, KAYANO, HIRONOBU, NAGATOSHI, YUKIKO
Publication of US20200292924A1 publication Critical patent/US20200292924A1/en
Priority to US17/368,490 priority Critical patent/US11506958B2/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/145—Housing details, e.g. position adjustments thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/30—Details adapted to collapse or fold, e.g. for portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback

Definitions

  • the present invention relates to a projector.
  • the reflection mirror is externally attached to a projection lens, there is a need to use a large reflection mirror, and there is a problem in that the device is increased in size.
  • the invention has been accomplished in view of the above-described circumstances, and an object of the invention is to provide a projector capable of performing landscape projection and portrait projection and freely setting a projection direction without causing an increase in size.
  • the invention provides a projector comprising an image forming panel, a projection optical system, a first connection member 44 , a first sensor, and a controller.
  • the image forming panel displays an image based on an original image.
  • the projection optical system has, in order from a screen side, a first optical system, a first reflection member, and a second optical system, and projects the image displayed on the image forming panel onto a screen as a magnified image.
  • the first reflection member bends a first optical axis of the first optical system at 90°.
  • the first connection member 44 connects the first optical system including the first reflection member to the second optical system to be rotationally movable in increments of 90° around a second optical axis of the second optical system.
  • the first sensor detects a rotational movement state of the first optical axis of the first optical system around the second optical axis in the first connection member 44 .
  • the controller changes an orientation of a display image of the image forming panel based on the rotational movement state detected by the first sensor to make an orientation of a projection image on a projection plane match the original image.
  • the projection optical system comprises a second reflection member and a third optical system.
  • the second reflection member bends the second optical axis of the second optical system at 90°.
  • the third optical system is disposed on the image forming panel side from the second reflection member.
  • the projection optical system has a second connection member and a second sensor.
  • the second connection member connects the second optical system and the second reflection member to the third optical system to be rotationally movable in increments of 90° around a third optical axis of the third optical system.
  • the second sensor detects a rotational movement state of the second optical axis of the second optical system around the third optical axis in the second connection member.
  • the controller changes the orientation of the display image of the image forming panel based on the rotational movement states detected by the first sensor and the second sensor to make the orientation of the projection image on the projection plane match the original image.
  • a reflection surface of each of the first reflection member and the second reflection member is a plane. It is preferable that the controller determines whether the display image is a vertically long portrait image or a horizontally long landscape image based on image orientation information to change an orientation of an image. It is preferable that the controller has an image orientation change input unit that inputs change of an image orientation.
  • the projector further comprises a projector body having the image forming panel, and a vertical shift mechanism.
  • the vertical shift mechanism shifts the projector body in a vertical direction.
  • the projector comprises a horizontal shift mechanism in addition to or instead of the vertical shift mechanism.
  • the horizontal shift mechanism shifts the projector body in a horizontal direction.
  • the projector further comprises a projector body having the image forming panel, and a rotational movement mechanism that rotationally moves the projector body around a vertical line.
  • FIG. 1 is a perspective view showing a projector of the invention.
  • FIG. 2 is a longitudinal sectional view of the projector.
  • FIG. 3 is a control block diagram.
  • FIG. 4 is a flowchart of orientation correction of a display screen.
  • FIG. 5 is a side view showing a bending pattern of a projection optical system.
  • FIG. 6 is a table illustrating the orientation correction of the display screen.
  • FIG. 7 is a side view showing a bending pattern of a projection optical system in a projector of Modification Example 1 in which a third optical axis is arranged in a vertical direction.
  • FIG. 8 is a table illustrating orientation correction of a display screen of Modification Example 1.
  • FIG. 9 is a side view of a second embodiment having a first connection member and a second connection member by motor drive.
  • FIG. 10 is a control block diagram in the second embodiment.
  • FIG. 11 is a side view of a third embodiment having a second connection member on a projector body side.
  • FIG. 12 is a side view showing a projector of a fourth embodiment using one mirror.
  • FIG. 13 is a perspective view showing a projector of a fifth embodiment that comprises a pedestal having a shift mechanism.
  • FIG. 14 is a perspective view showing a projector of a sixth embodiment that comprises a pedestal having a rotational movement mechanism.
  • a projector 10 of the embodiment comprises a projection optical system 11 and a projector body 12 .
  • the projector body 12 has an image forming panel 13 .
  • An image is displayed on an image display surface 13 a of the image forming panel 13 based on an original image.
  • the projection optical system 11 projects the image displayed on the image forming panel 13 onto a screen 15 as a magnified image.
  • the projection optical system 11 comprises, in order on an optical axis from the screen 15 to the image forming panel 13 , a first optical system 21 having a first optical axis CL 1 , a second optical system 22 having a second optical axis CL 2 , and a third optical system 23 having a third optical axis CL 3 .
  • an up-down direction, a right-left direction, and a front-rear direction are determined based on a state in which the projector body 12 turns a projection direction in a direction of the third optical axis CL 3 .
  • a first mirror 24 as a first reflection member is disposed between the first optical system 21 and the second optical system 22 .
  • the first mirror 24 has a reflection surface that is a plane, and bends the first optical axis CL 1 of the first optical system 21 through reflection to form the second optical axis CL 2 that intersects the first optical axis CL 1 at 90°.
  • a second mirror 25 as a second reflection member is disposed between the second optical system 22 and the third optical system 23 .
  • the second mirror 25 has a reflection surface that is a plane, and bends the second optical axis CL 2 through reflection to form the third optical axis CL 3 that intersects the second optical axis CL 2 at 90°.
  • the first optical system 21 has a first lens 31 and a second lens 32 in order on the first optical axis CL 1 from the screen 15 to the image forming panel 13 .
  • the second optical system 22 has a third lens 33 and a fourth lens 34 on the second optical axis CL 2 .
  • the third optical system 23 has a fifth lens 35 and a sixth lens 36 on the third optical axis CL 3 .
  • each of the first lens 31 , the second lens 32 , the third lens 33 , the fifth lens 35 , and the sixth lens 36 is shown as a single lens for simplification of illustration, each lens actually consists of a plurality of lens groups.
  • the sixth lens 36 and the fifth lens 35 image illumination light from the image forming panel 13 on an imaging plane 37 as an intermediate image.
  • the fourth lens 34 , the third lens 33 , the second lens 32 , and the first lens 31 project the image of the imaging plane 37 onto the screen 15 on a magnified scale.
  • the first optical system 21 , the second optical system 22 , the third optical system 23 , the first mirror 24 , and the second mirror 25 are stored in a lens barrel 26 .
  • the lens barrel 26 has a first holding barrel 41 , a second holding barrel 42 , a third holding barrel 43 , a first connection member 44 , and a second connection member 45 , and the members 41 to 45 are assembled integrally.
  • the first holding barrel 41 has a first lens frame 41 a , a second lens frame 41 b , and a first mirror frame 41 c .
  • the first lens frame 41 a is formed in a cylindrical shape, and the first lens 31 is fixed to the first lens frame 41 a .
  • the second lens frame 41 b is formed in a cylindrical shape, and the second lens 32 is fixed to the second lens frame 41 b .
  • the first mirror frame 41 c is formed in an angular tubular shaped having an inclined surface 46 , and has a connection barrel 47 in a lower portion.
  • the first mirror 24 is fixed to the inner surface of the inclined surface 46
  • the third lens 33 and the fourth lens 34 are fixed to the connection barrel 47 .
  • the second holding barrel 42 has a connection barrel member 42 a and a second mirror frame 42 b .
  • the connection barrel member 42 a is externally fitted to the connection barrel 47 of the first holding barrel 41 , and both of the connection barrel member 42 a and the connection barrel 47 are rotationally movably connected.
  • the first connection member 44 is constituted by the fitting structure of the connection barrel member 42 a and the connection barrel 47 .
  • the second mirror frame 42 b is formed in an angular tubular shape having an inclined surface 50 , and has a connection barrel 51 in a side portion.
  • the second mirror 25 is fixed to the inner surface of the inclined surface 50 .
  • the third holding barrel 43 is formed in a stepped cylindrical shape, and has a fourth lens frame 43 a , a flange 43 b , and a fifth lens frame 43 c .
  • the fifth lens 35 is fixed to the fourth lens frame 43 a .
  • the fourth lens frame 43 a is internally fitted to the connection barrel 51 of the second holding barrel 42 , and both of the fourth lens frame 43 a and the connection barrel 51 are rotationally movably connected.
  • the second connection member 45 is constituted by the fitting structure of the fourth lens frame 43 a and the connection barrel 51 of the second holding barrel 42 .
  • the flange 43 b is fixed to a lens mounting hole 62 a of a housing 62 .
  • the sixth lens 36 is fixed to the fifth lens frame 43 c.
  • the first connection member 44 connects the first holding barrel 41 to the second holding barrel 42 to be rotationally movable in increments of 90° around the second optical axis CL 2 of the second optical system 22 .
  • the second connection member 45 connects the second holding barrel 42 to the third holding barrel 43 to be rotationally movable in increments of 90° around the third optical axis CL 3 of the third optical system 23 .
  • the first connection member 44 is provided with a first click mechanism and a first sensor 55 (see FIG. 3 ).
  • the second connection member 45 is provided with a second click mechanism and a second sensor 56 (see FIG. 3 ).
  • the first connection member 44 and the second connection member 45 should rotationally movably connect both members, and various rotationally movable guide mechanisms can be used.
  • the first click mechanism is constituted of a known click mechanism.
  • the first click mechanism is configured such that one protrusion is locked to another storage portion each time the first holding barrel 41 is rotationally moved at 90° with respect to the second holding barrel 42 . With this, the rotational movement of the first holding barrel 41 is regulated in increments of 90°. Then, the first holding barrel 41 is rotationally moved with force beyond the rotational movement regulation, whereby the first click mechanism is unlocked, and next rotational movement is possible. In a case where the first holding barrel 41 is further rotationally moved at 90° in this state, rotational movement is regulated at a next click position.
  • the first sensor 55 detects a rotational movement state of the first optical axis CL 1 of the first optical system 21 around the second optical axis CL 2 in the first connection member 44 .
  • the rotational movement state refers to four states of an initial position where the first optical axis CL 1 , the second optical axis CL 2 , and the third optical axis CL 3 are in a U shape, a 90° position rotationally moved clockwise at 90° from the initial position, a 180° position further rotationally moved clockwise at 90° from the 90° position, and a 270° position further rotationally moved clockwise at 90° from the 180° position.
  • a mechanical sensor is used as the first sensor 55
  • an optical sensor, a detection sensor of a rotational movement angle by a rotary encoder, or the like may be used.
  • the second click mechanism regulates rotational movement of the second holding barrel 42 each time the second holding barrel 42 is rotationally moved at 90° with respect to the third holding barrel 43 .
  • the second click mechanism similarly to the first click mechanism, a known click mechanism is used.
  • the first connection member 44 and the second connection member 45 have rotational movement regulation members, respectively.
  • the rotational movement regulation members regulate rotational movement beyond 360° in the respective connection members 44 and 45 .
  • the lens configuration of the first lens 31 to the sixth lens 36 is described in detail, for example, in “Projection Optical System and Projection Display Device” of JP2016-156986A (corresponding to US2016/246037A1), JP2016-156983A (corresponding to US2016/246034A1), or the like.
  • the optical systems described in the documents can be used as the projection optical system 11 . With the projection optical systems and the projection display devices, an optical system having high projection performance of which aberrations are satisfactorily corrected at a wide angle is obtained.
  • the projector body 12 has a light source 63 , an image forming panel 13 , and a controller 69 stored in the housing 62 substantially having a rectangular parallelepiped shape.
  • the projector body 12 has a square longitudinal section and is formed in a rectangular parallelepiped shape as a whole to have a size in which the corners of the projector body 12 are positioned inside the rotational movement range of the first holding barrel 41 around the third optical axis CL 3 . Accordingly, even though the second holding barrel 42 is rotationally moved, the first holding barrel 41 does not come into contact with the projector body 12 .
  • the image forming panel 13 for example, a transmissive liquid crystal panel is used.
  • the light source 63 is disposed on a rear surface of the image forming panel 13 , that is, on an opposite side of the image forming panel 13 from the projection optical system 11 .
  • the light source 63 uses a light emitting diode (LED) that emits light of three colors of red (R), green (G), and blue (B) simultaneously, and illuminates the image forming panel 13 .
  • LED light emitting diode
  • R red
  • G green
  • B blue
  • the projection optical system 11 projects illumination light from the image forming panel 13 illuminated by the light source 63 onto the screen 15 .
  • the controller 69 has an image processing unit 70 , an image orientation determination unit 71 , an image memory 72 , a panel drive unit 73 , a light source drive unit 74 , and an image orientation change button 75 as an image orientation change input unit.
  • the image processing unit 70 executes image processing on a projection image from the image memory 72 and sends an image signal to the panel drive unit 73 .
  • the panel drive unit 73 drives the image forming panel 13 based on the image signal to display an image of three colors of RGB on the image display surface 13 a .
  • the light source drive unit 74 turns on the light source 63 .
  • the image orientation determination unit 71 corrects an orientation of an image displayed on the image forming panel 13 based on signals of the first sensor 55 and the second sensor 56 . In a case where the image orientation change button 75 is pressed, the image orientation determination unit 71 sequentially changes the orientation of the image.
  • FIG. 4 is a flowchart showing image orientation correction in the controller 69 .
  • the image orientation determination unit 71 detects an optical axis bending state of the projection optical system 11 based on the signals of the first sensor 55 and the second sensor 56 .
  • a relationship between a panel display image E 1 which is displayed on the image forming panel 13 , and an orientation of each of projection images E 21 to E 24 of the screen 15 in a bending state of the projection optical system 11 is known in advance.
  • the bending state of the projection optical system 11 is specified from among 16 patterns shown in FIG. 5 based on rotational movement detection states from the first sensor 55 and the second sensor 56 . Then, as shown in the table of FIG.
  • an image orientation correction value is specified based on the specified bending pattern, and the specified image orientation correction value is sent to the image processing unit 70 .
  • the image processing unit 70 changes an orientation of an original image E 0 based on the image orientation correction value, and displays panel display images E 1 and E 11 to E 18 on the image forming panel 13 .
  • the panel display images E 1 and E 11 to E 18 are changed in orientation by the two mirrors 24 and 25 to have the same orientation as the original image E 0 and are projected onto the screen 15 .
  • the image orientation determination unit 71 has table data 76 as the table of FIG. 6 that stores an optical axis bending state of the projection optical system 11 in association with an orientation correction value of an image, which is displayed on the image forming panel 13 in the bending state.
  • FIG. 5 shows all bending patterns of the projection optical system 11 that are obtained when the first holding barrel 41 and the second holding barrel 42 are individually rotationally moved in increments of 90° using the first connection member 44 and the second connection member 45 .
  • a state of the projection optical system 11 of a bending pattern (AA) is an initial state, and the optical axis is bent in a U shape.
  • the bending patterns obtained when the first holding barrel 41 is rotationally moved in order in increments of 90° clockwise from (AA) with respect to the second holding barrel 42 are (AB), (AC), and (AD).
  • the bending patterns obtained when the first holding barrel 41 is similarly rotationally moved in order in increments of 90° clockwise from (BA) are (BB), (BC), and (BD)
  • the bending patterns obtained when the first holding barrel 41 is similarly rotationally moved in order in increments of 90° clockwise from (CA) are (CB), (CC), and (CD)
  • the bending patterns obtained when the first holding barrel 41 is similarly rotationally moved in order in increments of 90° clockwise from (DA) are (DB), (DC), and (DD).
  • the bending patterns obtained when the second holding barrel 42 is rotationally moved in order in increments of 90° clockwise from (AA) with respect to the third holding barrel 43 are (BA), (CA), and (DA).
  • the bending patterns obtained when the second holding barrel 42 is similarly rotationally moved in order in increments of 90° clockwise from (AB) are (BB), (CB), and (DB).
  • the bending patterns obtained when the second holding barrel 42 is similarly rotationally moved in order in increments of 90° clockwise from (AC) are (BC), (CC), and (DC).
  • the bending patterns obtained when the second holding barrel 42 is similarly rotationally moved in order in increments of 90° clockwise from (AD) are (BD), (CD), and (DD).
  • the 16 bending state patterns of (AA) to (DD) can be constituted by the first connection member 44 and the second connection member 45 .
  • FIG. 6 is a table showing change in an image orientation in the respective bending patterns (AA) to (DD).
  • AA bending form of
  • an image formed by rotating the original image E 0 at 180° as a mirror image is displayed on the image forming panel 13 as the panel display image E 1 .
  • the panel display image is rotated like the screen projection images E 21 to E 24 in the second row of the table of FIG. 6 .
  • the screen projection image E 22 becomes a portrait image rotated counterclockwise at 90° in (AB)
  • the screen projection image E 23 becomes an upside-down landscape image rotated counterclockwise at 180° in (AC)
  • the screen projection image E 24 becomes a portrait image rotated counterclockwise at 270° in (AD).
  • the original image E 0 is projected onto the screen 15 in a rotated state like the screen projection images E 22 , E 23 , and E 24 . Therefore, the image is displayed in a state in which the orientation of the image is corrected like the panel display images E 11 , E 12 , E 13 , and E 14 in a lower section of a third row of the table of FIG. 6 .
  • screen projection images E 31 , E 32 , E 33 , and E 34 with the same orientation (the top, bottom, right, and left are the same) of the original image E 0 are displayed.
  • the image forming panel 13 is in landscape in (AB) and (CB) or (AD) and (CD). For this reason, the screen projection images E 32 and E 34 are displayed on a reduced scale because a horizontal side length of the original image is displayed in alignment with a vertical side length of the image forming panel 13 .
  • a fourth row of the table of FIG. 6 shows correction in a case where the original image is a portrait image. As shown in a lower section of the fourth row, correction is performed to the panel display images E 15 , E 16 , E 17 , and E 18 formed by correcting the orientation of the display image of the image forming panel 13 , whereby screen projection images E 35 , E 36 , E 37 , and E 38 are displayed as an image with the same orientation as the original image E 0 as shown in an upper section of the fourth row.
  • Projection toward a floor is performed in (BB) and (DD), and projection toward a ceiling is performed in (BD) and (DB).
  • the correction of the image orientation is not particularly performed.
  • the correction of the image orientation may be arbitrarily performed.
  • the image orientation change button 75 is operated.
  • the orientation of the panel display image E 1 displayed on the image forming panel 13 is sequentially changed for each one operation.
  • the panel display images E 11 to E 14 shown in the lower section of the third row of the table of FIG. 6 or the panel display images E 15 to E 18 shown in the lower section of the fourth row of the table of FIG. 6 are sequentially displayed on the image forming panel 13 .
  • the bending pattern becomes an upper rear projection position
  • (BA) and (DA) becomes a middle rear projection position
  • (CA) becomes a lower rear projection position
  • (AB) becomes an upper left projection position
  • (BB) becomes a lower bottom projection position
  • (CB) becomes a lower right projection position
  • (DB) becomes an upper top projection position
  • (AC) becomes an upper front projection position
  • (BC) and (DC) become a middle front projection position
  • CC) becomes a lower front projection position
  • (AD) becomes an upper right projection position
  • (BD) becomes an upper top projection position
  • (CD) becomes a lower left projection position
  • (DD) becomes a lower bottom projection position.
  • the projection image onto the screen 15 is projected constantly in the same orientation as the original image.
  • the image orientation change button 75 it is possible to sequentially change the orientation of the projection image.
  • the first holding barrel 41 is rotated in increments of 90° by the first connection member 44 or the second holding barrel 42 is rotated in increments of 90° by the second connection member 45 , it is possible to simply change the projection direction. Besides, even though the projection direction is changed, with the image orientation correction by the image orientation determination unit 71 and the image processing unit 70 , it is possible to display the image in the same orientation as the original image E 0 like the screen projection images E 31 to E 38 shown in FIG. 6 .
  • the original image is displayed and the orientation of the screen projection image is corrected with a manual operation while automatic determination regarding whether the display image is a landscape image or a portrait image is not performed
  • determination may be made whether or not the display image is a landscape image or a portrait image using image orientation information of the original image from the image memory 72 , and accordingly, the image orientation correction may be automatically performed as shown in the table of FIG. 6 .
  • FIG. 7 shows the same arrangement as the horizontal arrangement of FIG. 5 excluding that the projector is arranged vertically, and as in FIG. 5 , 16 kinds of bending patterns (AA) to (DD) obtained.
  • AA bending patterns
  • DD bending patterns
  • the third optical axis CL 3 may be projected in alignment with a center position of the projection image of the image forming panel 13 .
  • One or both of the image forming panel 13 and the projection optical system 11 may be shifted by a shift mechanism in a direction perpendicular to the third optical axis CL 3 .
  • the second optical axis is made to be rotationally movable in the whole circumferential direction of the third optical axis CL 3 using the housing 62 substantially in a rectangular parallelepiped shape having a square longitudinal section.
  • the invention may be carried out to a projector in which a projection optical system is disposed in a deflected manner on one side surface of a rectangular housing having a square longitudinal section because of the arrangement of a light source and the like. In this case, while the housing and the first optical system interfere with each other, and the projection direction is restricted as much, it is possible to perform portrait projection and landscape projection.
  • first holding barrel 41 or the second holding barrel 42 is rotationally moved manually, instead, in a projector 80 of a second embodiment shown in FIGS. 9 and 10 , the first connection member 44 and the second connection member 45 are rotationally moved by gear drive of a first motor 81 and a second motor 82 .
  • a first switch 85 and a second switch 86 are connected to a controller 79 .
  • the first motor 81 is rotated by a first motor drive unit 87 with an operation of the first switch 85 .
  • the first connection member 44 is rotated, whereby the orientation of the first optical system 21 can be changed.
  • the second motor 82 is rotated by a second motor drive unit 88 with an operation of the second switch 86 . With this, the second holding barrel 42 is rotated, whereby the orientation of the second optical system 22 can be changed.
  • the first sensor 55 and the second sensor 56 may be omitted.
  • the number of drive pulses corresponding to an amount of rotation of each of the motors 81 and 82 is counted to detect a rotational movement angle of the first optical system 21 or the second optical system 22 .
  • a rotational movement angle of a gear may be detected by a rotation detection plate and a sensor (not shown).
  • the rotation detection plate having a number of notches at given pitches is fixed to an outer circumferential surface of the gear, and passing of a large number of notches is detected by a photointerrupter to obtain the rotational movement angle.
  • a mount rotational movement unit 91 may be provided in a projector body 90 .
  • the mount rotational movement unit 91 has the same basic configuration as the second connection member 45 , and the same constituent members are represented by the same reference numerals.
  • a mount 92 is rotated by a motor 82 , whereby the second holding barrel 42 can be rotated around the third optical axis CL 3 .
  • the second mirror 25 is removed and only the first mirror 24 is used, thereby constituting a projection optical system 96 in which an optical axis is in an L shape.
  • a cylindrical second holding barrel 97 is provided instead of the second holding barrel 42 of the first embodiment substantially formed of a rectangular parallelepiped angular tube.
  • the configuration of the fourth embodiment is the same as in the first embodiment excluding that the second mirror 25 of the first embodiment is removed and the second holding barrel 97 is formed in a cylindrical shape, and the same constituent members as those in the first embodiment are represented by the same reference numerals.
  • the projection position of the projection image fluctuates with change in bending state of the projection optical system 11 .
  • a projector 100 of a fifth embodiment shown in FIG. 13 a projector body 12 is shifted using a pedestal 103 having shift mechanisms 101 and 102 , thereby eliminating the fluctuation of the projection position. For this reason, change in projection position by the first connection member 44 and the second connection member 45 , the projector body 12 is shifted a vertical shift mechanism 101 and a horizontal shift mechanism 102 by an amount of movement of the projection position.
  • first optical axis CL 1 in the vertical direction due to rotational movement of the second optical axis CL 2 by the vertical shift mechanism 101 , and to project the projection image at an invariably constant height. It is possible to eliminate the movement of the first optical axis CL 1 in the horizontal direction due to the rotational movement of the second optical axis CL 2 by the horizontal shift mechanism 102 , and to invariably align the first optical axis CL 1 as a projection optical axis with the center of the screen 15 .
  • One of the vertical shift mechanism 101 or the horizontal shift mechanism 102 may be omitted, and only the shift in the vertical direction or only the shift in the horizontal direction may be performed.
  • the pedestal 103 may be rotationally moved around a vertical line centering on the second optical axis CL 2 by a rotational movement mechanism 105 .
  • the rotational movement may be in increments of 90° or may be in increments of other angles.
  • the rotational movement center of the pedestal 103 should not be aligned with the second optical axis CL 2 , and should be a vertical line parallel to the second optical axis CL 2 .
  • the rotational movement may be performed manually in addition to motor drive.
  • rotational movement mechanism 105 may be simply provided or the rotational movement mechanism 105 may be provided in the pedestal 103 having either of the shift mechanism 101 or 102 .
  • the rotational movement mechanism 105 is provided, whereby projection can be performed in all directions of a horizontal plane while the portrait screen or the landscape screen is maintained.
  • the light source 63 is disposed on the front surface side of the image forming panel 13 to perform simultaneous irradiation of irradiation light of three colors of RGB.
  • the light source 63 is disposed on the front surface side of the image forming panel 13 to emit LED of three colors of RGB in a time-division manner in synchronization with a forming timing of a three-color image of the DMD.
  • the invention can also be applied to a case where the projector is used while being suspended from a ceiling or the like.
  • a projection plane is not limited to the screen 15 , and the projector can be used as a projector that projects an image on various projection planes.
  • terms such as perpendicular and parallel, have been used to represent a positional relationship between the plurality of optical axes or specific numerical values of an angle, such as 90°, have been used for description.
  • the terms or the numerical values include a range to be allowed with an error based on accuracy required for the optical system.
  • the projection optical system 11 may be attachably and detachably mounted in the projector body 12 .
  • a part of lenses of the first optical system 21 for example, the first lens 31 and the second lens 32 may be provided in the projector body, and the number of lenses on the projection optical system 11 side may be decreased.
  • connection barrel member 42 a connection barrel member
  • connection barrel 51 connection barrel
  • E 1 , E 11 to E 18 panel display image

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Lenses (AREA)
  • Controls And Circuits For Display Device (AREA)
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JP7220793B2 (ja) * 2019-07-29 2023-02-10 富士フイルム株式会社 投射レンズ及び投射装置
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US11392015B2 (en) * 2018-11-02 2022-07-19 Fujifilm Corporation Projection lens and projection device

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EP3719571A1 (en) 2020-10-07
EP3719571A4 (en) 2021-01-20
WO2019107482A1 (ja) 2019-06-06
JP2020046678A (ja) 2020-03-26
JP6909846B2 (ja) 2021-07-28
EP3719571B1 (en) 2022-09-28
US20200292924A1 (en) 2020-09-17
CN111417899B (zh) 2021-10-29
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US11506958B2 (en) 2022-11-22
US20210333696A1 (en) 2021-10-28
CN111417899A (zh) 2020-07-14

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